Existing Lease Terms and Renewal Options for Each of UHS Hospital Facilities (Parenthetical) (Detail) - Universal Health Services, Inc	1 Months Ended	9 Months Ended
	Jun. 30, 2016 Time	Sep. 30, 2016 Time RenewalOption
Operating Leased Assets [Line Items]
Number of renewal options at existing lease rates	3
McAllen Medical Center
Operating Leased Assets [Line Items]
Number of renewal options at existing lease rates		2
Renewal options term at existing lease rates		5 years
Renewal options at existing lease rates expiration year		2031
Wellington Regional Medical Center And Southwest Healthcare System
Operating Leased Assets [Line Items]
Number of renewal options at fair market value lease rates | RenewalOption		2
Renewal options term at fair market value lease rates		5 years
Wellington Regional Medical Center And Southwest Healthcare System | Minimum
Operating Leased Assets [Line Items]
Renewal options at fair market value lease rates expiration year		2022
Wellington Regional Medical Center And Southwest Healthcare System | Maximum
Operating Leased Assets [Line Items]
Renewal options at fair market value lease rates expiration year		2031